Inductive proximity sensor PL-05N 5mm with NPN output

  - It has an Atmega328P chip running at 16Mhz with factory-loaded bootloader
- The Uno R3 module has all the Arduino Uno R3 connectors and is compatible with all Arduino shields   Characteristic:   - ATmega328P 16MHz chip with external quartz crystal
- Microprocessor: ATMega328P
- Operating voltage: 5V
- Input voltage (recommended): 7-12V
- Input voltage (limits): 6-20V
- Clock speed: 16 MHz
- Digital I / O pins: 14 (6 with PWM)
- Analog input pins: 6
- DC current for Pin I / O: 20 mA
- Flash32 KB of which 0.5 KB are used by the bootloader - AtMega328P
- SRAM 2 KB - AtMega328P
- EEPROM 1 KB - AtMega328P
- Communication: micro USB female 

Servos Tester features:
- 3-Channel Tester
- For Electronica Arduino

High sensitivity to Ammonia (NH3), Nitrogen oxides (NOx), Alcohol, Sulphides, Benzene (C6H6), CO2, smoke and other harmful gases.  The MQ-135 sensor is to sensible for other gasses in the air so that is not possible to get good values for CO2 from it.
MQ-135 Air Quality Sensor features:
- Main chip: MQ-135 natural gas sensor and comparator LM393
- Working voltage: 5V
- Current: 150mA
- Digital output: TTL 0/1
- Analog output: analog voltage sensing value
- Quick response features:
- Detection concentration:
   10ppm - 300ppm NH3
   10ppm - 1000ppm Benzene
   10ppm - 300ppm Alcohol
- Adjustable sensitivity with the potentiometer
- Size: 32mm x 20mmx 18mm

40x Female Male 10cm features:
- Length: 10cm
- Quantity: 40 cables
- Compatible with 2.54mm male connectors
- High quality and good working conditions
- Easy to install and use

The MAX9812 is a sound amplifier specially designed to treat the signal coming from microphones.
We can use it together with Arduino to measure sound from a processor like Arduino.
When we saw the modules with microphone we commented that, in general, the signal generated is too low to be registered correctly.
If we want to be able to measure sounds, we will have to amplify the signal. The MAX9812L has single / dual inputs, fixed gain of 20dB, bandwidth of 400 kHz, low noise and low signal distortion 0.015% THD.
There are two models, its supply voltage is 2.7V to 3.6V.
We can use the sensors with MAX9812 for applications that require measuring the intensity or frequency of the sound.

Arduino compatible IR motion detector with a detection range of 3 meters.
One sensor electric pyro, which can detect infrared radiation levels - detect a change in the average IR levels of your detection zone.
Ideal for projects with ARDUINO, PIC, AVR, STM32.
Characteristic:
- Operating voltage: 4.5V- 20V
- Consumption in idle state:

Soldering Aid Kit Welding Tools features:
- Variety of applications for precision work
- To meet the requirements of welding operation of the press, cutting, scraping, hooks brushes etc
- Content:
  1x Welding aid knife
  1x Welding Fork Assistance
  1x Welding assistance scraper
  1x Hook assistant chip retention
  1x Welding brush for assistance
  1x Spatula